fix(models): pass structured humanizeError to toast on import scan failure

`humanizeError()` returns an object; interpolating it into a template string
produced "[object Object]", hiding the real scan failure (same pitfall fixed
for lazy-deps). Pass the object directly so toast renders message, hint, and raw.

Co-authored-by: 晴天 <1186258278@users.noreply.github.com>

src/pages/models.js

@@ -1308,7 +1308,7 @@ async function importClientConfigs(page, state) {
     const result = await api.scanModelClientConfigs()
     candidates = Array.isArray(result?.candidates) ? result.candidates : []
   } catch (e) {
-    toast(`${t('models.importScanFailed')}: ${humanizeError(e)}`, 'error')
+    toast(humanizeError(e, t('models.importScanFailed')), 'error')
     return
   } finally {
     if (btn) { btn.disabled = false; btn.textContent = oldText || t('models.importClientConfigs') }